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  • Keywords: exopolysaccharide; rheology; emulsifier  (1)
  • RAPD  (1)
  • Springer  (2)
  • American Chemical Society
  • 1995-1999  (2)
  • 1965-1969
Collection
Keywords
Publisher
  • Springer  (2)
  • American Chemical Society
Years
  • 1995-1999  (2)
  • 1965-1969
Year
  • 1
    Electronic Resource
    Electronic Resource
    Effect of cations, pH and sulfate content on the viscosity and emulsifying activity of the Halomonas eurihalina exopolysaccharide (1998)
    Springer
    Journal of industrial microbiology and biotechnology 20 (1998), S. 205-209 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: exopolysaccharide; rheology; emulsifier
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The effects of monovalent and divalent cations on the rheological behavior of Halomonas eurihalina exopolysaccharide (EPS) were studied. Sodium, potassium, magnesium and calcium were added and the relative abilities to increase viscosity were as follows: KCl 〉 NaCl 〉 MgCl2 〉 CaCl2. The highest viscosity value was measured in acidic 10−4 M KCl, in which a gel formed. A loss of sulfate content seemed to correlate with the increase of viscosity. H. eurihalina produced EPS in all growth media. Addition of hydrophobic substrates to culture media produced changes in chemical composition and emulsifying activity of the EPS. Xylene was the most effectively emulsified substance and the EPS produced on tetradecane and on corn oil the most active emulsifier.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900513
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic diversity and relationships of cacao (Theobroma cacao L.) in southern Mexico (1998)
    Springer
    Theoretical and applied genetics 96 (1998), S. 621-627 
    Details
    ISSN: 1432-2242
    Keywords: Key words Cacao ; Theobroma cacao ; Genetic diversity ; Crop evolution ; RAPD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Neotropical tree crops are affected by a combination of biological and human factors that complicate the study of genetic diversity and crop evolution. Genetic diversity and relationships among southern Mexican populations and horticultural collections of Theobroma cacao (chocolate, cocoa, cacao) are examined in light of the agricultural practices of the Maya. Collections of cacao were obtained from the extremes of its geographic range including archeological sites in southern Mexico where cacao was first domesticated. Genetic diversity was assayed by 57 informative random amplified polymorphic DNA (RAPD) marker loci. A unique sample of the total diversity found in this study exists in the southern Mexican populations. These populations are significantly different from all other cacao with regards to their profile of RAPD bands, including the ‘criollo’ variety, their morphological and geographical group. A population of cacao found in a sinkhole (cenote) in northern Yucatan with genetic affinities to populations in Chiapas suggests the Maya maintained plants far away from their native habitat. This finding concurs with known agroforestry practices of the Maya. Modern efforts to increase germplasm of tropical tree crops such as cacao should carefully examine archeological sites where genetic diversity, either deliberately or by chance, was collected and maintained by ancient cultures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050780
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